Origin:  L2-L4 roots, lumbar plexus, femoral nerve

Recording Site:  Rectus Femoris muscle (Rec Fem)

Reference Site:  Distal thigh

Ground:  Medial thigh

Stimulation Site:  Groin

Procedure:  The recording electrode is placed over the belly of the Rec Fem.  The reference electrode is placed on the distal thigh above the knee.  Stimulation occurs in the groin at the crease, just lateral to the femoral artery pulse.  The femoral artery is slightly below the inguinal tendon in the mid groin region.